If a study with a very large sample size yields a statistically significant result ($p<0.01$) for a small conversion rate increase of $0.001\%$, what is the implication for the finding?
Answer
The result is statistically reliable but likely has virtually no economic impact or practical usefulness.
Large samples can detect tiny, statistically reliable differences, but these minuscule effects may hold no practical or economic relevance, requiring context for assessment.
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